UNION GAP, Wash. - The slow-moving landslide at Rattlesnake Ridge has been moving at roughly the same rate of speed since January, officials monitoring the slide said Monday.
The slide mass continues to move south into an adjacent quarry at a constant rate of about 1.7 feet per week, according to the Yakima Valley Office of Emergency Management.
Thorp Road, which is at the base of the ridge, will remain closed until the landslide stabilizes, and that could take anywhere from weeks to years. People commuting on Interstate 82 may see workers in the area.
The landslide forced over 50 people to evacuate from their homes along the ridge in January. They have since been allowed to return, although a level 1 “be ready” warning remains in place.
The YVOEM is working with multiple agencies including the Washington State Department of Transportation to continue monitoring the slide and provide updates.
The Rattlesnake Ridge landslide is located just south of Union Gap along I-82 and the Yakima River.
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